IQueryable VS IEnumerable

Question

以下两个查询在速度上有区别吗？在这两个查询中，我都返回了自定义对象。

第一个查询使用 IQueryable ，而另一个查询使用 IEnumerable

    public IEnumerable<InvoiceViewModel> GetDraftInvoices(int companyId, string locale, InvoiceStatus invoStatus, Guid refNo)
    {
        IQueryable<InvoiceViewModel> draftInvoces = (from invo in _context.Invoice
                                                      join cus in _context.Customer
                                                      on invo.CustomerId equals cus.CustomerId
                                                      where invo.CompanyId == companyId 
                                                      && invo.InvoiceStatus == invoStatus.ToString()
                                                      && (refNo == Guid.Empty || cus.RefNo == refNo)
                                                      select new InvoiceViewModel
                                                      {
                                                          StringInvoNumber = invo.InvoiceNumber.ToString().PadLeft((int)NumberPadd.TicketNumber, '0'),
                                                          CustomerName = cus.CustomerName,
                                                          ContractName = !string.IsNullOrEmpty(invo.ContractName) ? invo.ContractName : "N/A"
                                                      });

        return draftInvoces;
    }


    public IEnumerable<InvoiceViewModel> GetDraftInvoices(int companyId, string locale, InvoiceStatus invoStatus, Guid refNo)
    {
        IEnumerable<InvoiceViewModel> draftInvoces = (from invo in _context.Invoice
                                                      join cus in _context.Customer
                                                      on invo.CustomerId equals cus.CustomerId
                                                      where invo.CompanyId == companyId 
                                                      && invo.InvoiceStatus == invoStatus.ToString()
                                                      && (refNo == Guid.Empty || cus.RefNo == refNo)
                                                      select new InvoiceViewModel
                                                      {
                                                          StringInvoNumber = invo.InvoiceNumber.ToString().PadLeft((int)NumberPadd.TicketNumber, '0'),
                                                          CustomerName = cus.CustomerName,
                                                          ContractName = !string.IsNullOrEmpty(invo.ContractName) ? invo.ContractName : "N/A"
                                                      });

        return draftInvoces;
    }